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Annotation of 43BSD/contrib/icon/book/15/recexp.icn, revision 1.1.1.1

1.1       root        1: procedure main()
                      2:    while writes(line := read()) do
                      3:       if line ? (X() & pos(0)) then write(" accepted")
                      4:       else write(" rejected")
                      5: end
                      6: 
                      7: procedure X()
                      8:    suspend T() | (T() || ="+" || X())
                      9: end
                     10: 
                     11: procedure T()
                     12:    suspend E() | (E() || ="*" || T())
                     13: end
                     14: 
                     15: procedure E()
                     16:    suspend ="x" | "=y" | "=z" | (="(" || X() || =")")
                     17: end

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